I got puzzled by that myself when I was finally beginning to sort the contents of that huge bundle in collections recently and...
I found this post:
https://itch.io/post/5507338/view-in-topic
...Mentioning:
https://lampysprites.itch.io/egg
...Which is deleted and corresponds with the deleted link you get in the bundle:
https://lampysprites.itch.io/deleted-1
That doesn't help too much because I don't know what "egg" is either, lol! Based on what lampy makes though, it may be some egg sprites, blender egg or a game based around an egg.